/Engine/Plugins/Experimental/Mutable/Source/CustomizableObject/Public/MuCO/CustomizableObjectInstanceDescriptor.h
See FMultilayerProjector::VirtualLayer.
void MultilayerProjectorCreateVirtualLayer ( const [FName](API\Runtime\Core\UObject\FName) & ProjectorParamName, const [FName](API\Runtime\Core\UObject\FName) & Id )